Actual source code: ex52.c


  2: static char help[] = "Tests various routines in MatMPIBAIJ format.\n";

  4: #include <petscmat.h>

  6: int main(int argc,char **args)
  7: {
  8:   Mat            A;
  9:   PetscInt       m=2,bs=1,M,row,col,start,end,i,j,k;
 10:   PetscMPIInt    rank,size;
 11:   PetscScalar    data=100;
 12:   PetscBool      flg;

 14:   PetscInitialize(&argc,&args,(char*)0,help);
 15:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 16:   MPI_Comm_size(PETSC_COMM_WORLD,&size);

 18:   /* Test MatSetValues() and MatGetValues() */
 19:   PetscOptionsGetInt(NULL,NULL,"-mat_block_size",&bs,NULL);
 20:   PetscOptionsGetInt(NULL,NULL,"-mat_size",&m,NULL);

 22:   M    = m*bs*size;
 23:   MatCreateBAIJ(PETSC_COMM_WORLD,bs,PETSC_DECIDE,PETSC_DECIDE,M,M,PETSC_DECIDE,NULL,PETSC_DECIDE,NULL,&A);

 25:   MatGetOwnershipRange(A,&start,&end);
 26:   PetscOptionsHasName(NULL,NULL,"-column_oriented",&flg);
 27:   if (flg) {
 28:     MatSetOption(A,MAT_ROW_ORIENTED,PETSC_FALSE);
 29:   }

 31:   /* inproc assembly */
 32:   for (row=start; row<end; row++) {
 33:     for (col=start; col<end; col++,data+=1) {
 34:       MatSetValues(A,1,&row,1,&col,&data,INSERT_VALUES);
 35:     }
 36:   }
 37:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 38:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);

 40:   /* offproc assembly */
 41:   data = 5.0;
 42:   row  = (M+start-1)%M;
 43:   for (col=0; col<M; col++) {
 44:     MatSetValues(A,1,&row,1,&col,&data,ADD_VALUES);
 45:   }
 46:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 47:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);

 49:   /* Test MatSetValuesBlocked() */
 50:   PetscOptionsHasName(NULL,NULL,"-test_setvaluesblocked",&flg);
 51:   if (flg) {
 52:     PetscScalar *bval;
 53:     row /= bs;
 54:     col  = start/bs;
 55:     PetscMalloc1(bs*bs,&bval);
 56:     k = 1;
 57:     /* row oriented - default */
 58:     for (i=0; i<bs; i++) {
 59:       for (j=0; j<bs; j++) {
 60:         bval[i*bs+j] = (PetscScalar)k; k++;
 61:       }
 62:     }
 63:     MatSetValuesBlocked(A,1,&row,1,&col,bval,INSERT_VALUES);
 64:     MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 65:     MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
 66:     PetscFree(bval);
 67:   }

 69:   MatView(A,PETSC_VIEWER_STDOUT_WORLD);
 70:   MatDestroy(&A);
 71:   PetscFinalize();
 72:   return 0;
 73: }

 75: /*TEST

 77:    test:
 78:       suffix: 1
 79:       nsize: 3
 80:       args: -mat_block_size 2 -test_setvaluesblocked

 82:    test:
 83:       suffix: 2
 84:       nsize: 3
 85:       args: -mat_block_size 2 -test_setvaluesblocked -column_oriented

 87:    test:
 88:       suffix: 3
 89:       nsize: 3
 90:       args: -mat_block_size 1 -test_setvaluesblocked

 92:    test:
 93:       suffix: 4
 94:       nsize: 3
 95:       args: -mat_block_size 1 -test_setvaluesblocked -column_oriented

 97: TEST*/